840886899 has 4 divisors (see below), whose sum is σ = 1121182536. Its totient is φ = 560591264.

The previous prime is 840886799. The next prime is 840886909. The reversal of 840886899 is 998688048.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 840886899 - 2²⁴ = 824109683 is a prime.

It is not an unprimeable number, because it can be changed into a prime (840886099) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 140147814 + ... + 140147819.

It is an arithmetic number, because the mean of its divisors is an integer number (280295634).

Almost surely, 2^840886899 is an apocalyptic number.

840886899 is a deficient number, since it is larger than the sum of its proper divisors (280295637).

840886899 is a wasteful number, since it uses less digits than its factorization.

840886899 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 280295636.

The product of its (nonzero) digits is 7962624, while the sum is 60.

The square root of 840886899 is about 28998.0499171927. The cubic root of 840886899 is about 943.8707521237.

The spelling of 840886899 in words is "eight hundred forty million, eight hundred eighty-six thousand, eight hundred ninety-nine".